Hydrangeas are native to Asia and the Americas. Most are shrubs, but a few are small trees or vines. They can be evergreen or deciduous, although most of the hydrangeas we see in cultivation are the latter.
The genus Hydrangea has 70-75 species and hundreds of cultivars. In our garden, we have species and cultivars of
Hydrangeas have two flower arrangements. Mophead flowers are large pompoms, and lacecap flowers have flat flowerheads with a centre of small flowers surrounded by larger ones.
The colour of the flower can change according to the acidity of the soil. An acidic soil (pH below 7) will produce flowers that are blue to purple, whereas an alkaline soil (pH above 7) will produce pink or red flowers.